| 摘要 |
<p>The indicator is for passage valves, esp. for pipe lines. The valve cone is externally actuated by a non-turnable push rod, via a turnably held double armed lever. The indicator hube (7) is controlled by a helical single ball track, with the ball groove (9) being positioned in the push rod (3). A ball (10) is held freely turnable in an adjusting screw (11), and engages in the groove. The adjusting screw is positioned radially adjustable in the indicator hub (7), so that the ball is moved without play into the groove by the screw. The screw is secured from the front end face of the hub by a threaded pin or similar (12).</p> |
